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https://github.com/eggjs/egg-mysql

MySQL plugin for egg
https://github.com/eggjs/egg-mysql

egg egg-mysql egg-plugin mysql

Last synced: about 2 months ago
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MySQL plugin for egg

Host: GitHub
URL: https://github.com/eggjs/egg-mysql
Owner: eggjs
License: mit
Created: 2016-08-26T07:20:17.000Z (about 8 years ago)
Default Branch: master
Last Pushed: 2023-03-06T13:57:50.000Z (over 1 year ago)
Last Synced: 2024-04-14T02:40:49.296Z (5 months ago)
Topics: egg, egg-mysql, egg-plugin, mysql
Language: TypeScript
Homepage:
Size: 85 KB
Stars: 329
Watchers: 16
Forks: 60
Open Issues: 2
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE

Awesome Lists containing this project

awesome-egg - egg-mysql - MySQL plugin for egg. ![](https://img.shields.io/github/stars/eggjs/egg-mysql.svg?style=social&label=Star) ![](https://img.shields.io/npm/dm/egg-mysql.svg?style=flat-square) (仓库 / 插件)

README

        # egg-mysql

[![NPM version][npm-image]][npm-url]

[![Node.js CI](https://github.com/eggjs/egg-mysql/actions/workflows/nodejs.yml/badge.svg)](https://github.com/eggjs/egg-mysql/actions/workflows/nodejs.yml)

[![Test coverage][codecov-image]][codecov-url]

[![npm download][download-image]][download-url]

[npm-image]: https://img.shields.io/npm/v/egg-mysql.svg?style=flat-square

[npm-url]: https://npmjs.org/package/egg-mysql

[codecov-image]: https://img.shields.io/codecov/c/github/eggjs/egg-mysql.svg?style=flat-square

[codecov-url]: https://codecov.io/github/eggjs/egg-mysql?branch=master

[download-image]: https://img.shields.io/npm/dm/egg-mysql.svg?style=flat-square

[download-url]: https://npmjs.org/package/egg-mysql

Aliyun rds client(support mysql portocal) for egg framework

## Install

```bash

npm i egg-mysql --save

```

MySQL Plugin for egg, support egg application access to MySQL database.

This plugin based on [ali-rds](https://github.com/ali-sdk/ali-rds), if you want to know specific usage, you should refer to the document of [ali-rds](https://github.com/ali-sdk/ali-rds).

## Configuration

Change `${app_root}/config/plugin.ts` to enable MySQL plugin:

```ts

export default {

  mysql: {

    enable: true,

    package: 'egg-mysql',

  },

}

```

Configure database information in `${app_root}/config/config.default.ts`:

### Simple database instance

```ts

export default {

  mysql: {

    // database configuration

    client: {

      // host

      host: 'mysql.com',

      // port

      port: '3306',

      // username

      user: 'test_user',

      // password

      password: 'test_password',

      // database

      database: 'test',

    },

    // load into app, default is open

    app: true,

    // load into agent, default is close

    agent: false,

  },

}

```

Usage:

```ts

await app.mysql.query(sql, values); // you can access to simple database instance by using app.mysql.

```

### Multiple database instance

```ts

export default {

  mysql: {

    clients: {

      // clientId, access the client instance by app.mysql.get('clientId')

      db1: {

        // host

        host: 'mysql.com',

        // port

        port: '3306',

        // username

        user: 'test_user',

        // password

        password: 'test_password',

        // database

        database: 'test',

      },

      // ...

    },

    // default configuration for all databases

    default: {

    },

    // load into app, default is open

    app: true,

    // load into agent, default is close

    agent: false,

  },

}

```

Usage:

```ts

const client1 = app.mysqls.get('db1');

await client1.query(sql, values);

const client2 = app.mysqls.get('db2');

await client2.query(sql, values);

```

## CRUD user guide

### Create

```ts

// insert

const result = await app.mysql.insert('posts', { title: 'Hello World' });

const insertSuccess = result.affectedRows === 1;

```

### Read

```ts

// get

const post = await app.mysql.get('posts', { id: 12 });

// query

const results = await app.mysql.select('posts',{

  where: { status: 'draft' },

  orders: [['created_at','desc'], ['id','desc']],

  limit: 10,

  offset: 0

});

```

### Update

```ts

// update by primary key ID, and refresh

const row = {

  id: 123,

  name: 'fengmk2',

  otherField: 'other field value',

  modifiedAt: app.mysql.literals.now, // `now()` on db server

};

const result = await app.mysql.update('posts', row);

const updateSuccess = result.affectedRows === 1;

```

### Delete

```ts

const result = await app.mysql.delete('table-name', {

  name: 'fengmk2',

});

```

## Transaction

### Manual control

- adventage: `beginTransaction`, `commit` or `rollback` can be completely under control by developer

- disadventage: more handwritten code, Forgot catching error or cleanup will lead to serious bug.

```ts

const conn = await app.mysql.beginTransaction();

try {

  await conn.insert(table, row1);

  await conn.update(table, row2);

  await conn.commit();

} catch (err) {

  // error, rollback

  await conn.rollback(); // rollback call won't throw err

  throw err;

}

```

### Automatic control: Transaction with scope

- API：`async beginTransactionScope(scope, ctx)`

  - `scope`: A generatorFunction which will execute all sqls of this transaction.

  - `ctx`: The context object of current request, it will ensures that even in the case of a nested transaction, there is only one active transaction in a request at the same time.

- adventage: easy to use, as if there is no transaction in your code.

- disadvantage: all transation will be successful or failed, cannot control precisely

```ts

const result = await app.mysql.beginTransactionScope(async (conn) => {

  // don't commit or rollback by yourself

  await conn.insert(table, row1);

  await conn.update(table, row2);

  return { success: true };

}, ctx); // ctx is the context of current request, access by `this.ctx`.

// if error throw on scope, will auto rollback

```

## Advance

### Custom SQL splicing

```ts

const results = await app.mysql.query('update posts set hits = (hits + ?) where id = ?', [ 1, postId ]);

```

### Literal

If you want to call literals or functions in mysql , you can use `Literal`.

#### Inner Literal

- NOW(): The database system time, you can obtain by `app.mysql.literals.now`.

```ts

await app.mysql.insert(table, {

  create_time: app.mysql.literals.now,

});

// INSERT INTO `$table`(`create_time`) VALUES(NOW())

```

#### Custom literal

The following demo showed how to call `CONCAT(s1, ...sn)` funtion in mysql to do string splicing.

```ts

const Literal = app.mysql.literals.Literal;

const first = 'James';

const last = 'Bond';

await app.mysql.insert(table, {

  id: 123,

  fullname: new Literal(`CONCAT("${first}", "${last}"`),

});

// INSERT INTO `$table`(`id`, `fullname`) VALUES(123, CONCAT("James", "Bond"))

```

## Questions & Suggestions

Please open an issue [here](https://github.com/eggjs/egg/issues).

## License

[MIT](LICENSE)

## Contributors

|[
_fengmk2](https://github.com/fengmk2)
|[
_jtyjty99999](https://github.com/jtyjty99999)
|[
_popomore](https://github.com/popomore)
|[
_{semantic-release-bot}](https://github.com/semantic-release-bot)
|[
_atian25](https://github.com/atian25)
|[
_dead-horse](https://github.com/dead-horse)
|

| :---: | :---: | :---: | :---: | :---: | :---: |

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_AntiMoron](https://github.com/AntiMoron)
|[
_guoshencheng](https://github.com/guoshencheng)
|[
_Krryxa](https://github.com/Krryxa)
|[
_cnwangjie](https://github.com/cnwangjie)
|[
_starandtina](https://github.com/starandtina)
|[
_shangwenhe](https://github.com/shangwenhe)


This project follows the git-contributor [spec](https://github.com/xudafeng/git-contributor), auto updated at `Mon Mar 06 2023 21:57:18 GMT+0800`.